Other interesting sites about Cosmic Rays and Detector projects:

• The CosmicPi project
• Cosmic Watch
• ERGO – Energetic Ray Global Observatory
• SOLTA
• AstroParticelle
• HiSPARC Project
• Cosmic Ray Telescopes 
• My projects on hackaday.io not all cosmic ray detectors though.

If you would like me to add your website about cosmic rays just contact me
Robert Hart at robert@cosmicray.com.au